Exhibit 99.1
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Appendix 3H - Notification of cessation of securities |
Announcement Summary
Entity name
IMMURON LIMITED
Announcement Type
New announcement
Date of this announcement
Thursday June 18, 2026
Details of +securities that have ceased
| ASX +security code | Security description | Number of +securities that have ceased | The +securities have ceased due to | Date of cessation | ||||||
| IMCAI | OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES | 1,430,000 | Expiry of option or other convertible security without exercise or conversion | 18/06/2026 | ||||||
Refer to next page for full details of the announcement
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Appendix 3H - Notification of cessation of securities |
Part 1 - Announcement Details
| 1.1 | Name of +Entity |
IMMURON LIMITED
We (the entity named above) provide the following information about our issued capital.
| 1.2 Registered Number Type | Registration Number | |
| ABN | 80063114045 |
| 1.3 | ASX issuer code |
IMC
| 1.4 | The announcement is |
New announcement
| 1.5 | Date of this announcement |
18/6/2026
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Appendix 3H - Notification of cessation of securities |
Part 2 - Details of +equity securities or +debt securities that have ceased
ASX +Security Code and Description
IMCAI : OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES
Unquoted +equity securities that have ceased
Number of securities that have ceased
1,430,000
Reason for cessation
Expiry of option or other convertible security without exercise or conversion
| Date of cessation | Is the entity paying any consideration for the cessation? | ||
| 18/6/2026 | No |
Any other information the entity wishes to notify to ASX about the cessation?
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Appendix 3H - Notification of cessation of securities |
Part 3 - Issued capital following changes
Following the cessation of the +securities the subject of this notification, the issued capital of the entity will comprise:
The figures in parts 3.1 and 3.2 below are automatically generated and may not reflect the entity’s current issued capital if other Appendix 2A, Appendix 3G or Appendix 3H forms are currently with ASX for processing.
| 3.1 | Quoted +equity securities and +debt securities (total number of each +class of +securities quoted on ASX) |
| ASX +security code and description | Total number of +securities on issue | |||
| IMC : ORDINARY FULLY PAID | 326,653,609 | |||
| 3.2 | Unquoted +equity securities (total number of each +class of +equity securities issued but not quoted on ASX) |
| ASX +security code and description | Total number of +securities on issue | |||
| IMCAE : PERFORMANCE RIGHTS | 3,767,492 | |||
| IMCAI : OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES | 8,000,000 | |||
Note: the figures stated in the tables above are used to calculate the total market capitalisation of the entity published by ASX from time to time. The table will not include those classes of +securities that have ceased or lapsed in their entirety in ASX records before the announcement date described in Q1.5, even if the entity has advised ASX of a change to that class of +security in Part 2 of this form.
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